We used a bouncer in our daughters early years, but didn't use a walker as we didn't see the point. Not from a safety point of view, it just seemed pointless and we didn't think they helped her strengthen her legs more than crawling did.
She was pulling herself up to a standing position from about 7 months and was taking her first steps at around 8 months.
She is now confident on her feet and will happily toddle along for minutes on end. If [when] she falls over, she just gets back up again and carries on as if nothing happened.
Her first birthday is next month.